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ntdll: Win64 fix for get_pointer_obfuscator.

This commit is contained in:
Erik de Castro Lopo 2008-04-25 11:54:30 +10:00 committed by Alexandre Julliard
parent 0ef69ef9dd
commit eba704b8bb
1 changed files with 2 additions and 2 deletions
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4
dlls/ntdll/rtl.c
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@ -904,10 +904,10 @@ static DWORD_PTR get_pointer_obfuscator( void )
rand = RtlUniform( &seed );
/* handle 64bit pointers */
rand ^= RtlUniform( &seed ) << ((sizeof (DWORD_PTR) - sizeof (ULONG))*8);
rand ^= (ULONG_PTR)RtlUniform( &seed ) << ((sizeof (DWORD_PTR) - sizeof (ULONG))*8);
/* set the high bits so dereferencing obfuscated pointers will (usually) crash */
rand |= 0xc0000000 << ((sizeof (DWORD_PTR) - sizeof (ULONG))*8);
rand |= (ULONG_PTR)0xc0000000 << ((sizeof (DWORD_PTR) - sizeof (ULONG))*8);
interlocked_cmpxchg_ptr( (void**) &pointer_obfuscator, (void*) rand, NULL );
}